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    GCF of 64 and 80 (Greatest Common Factor)

    "Greatest Common Factor" Calculator
    Greatest Common Factor of
    and

    What is the Greatest Common Divisor of 64 and 80?

    Answer

    GCF of 64 and 80 is
    16

    (Sixteen)

    Finding GCF for 64 and 80 using all factors (divisors) listing

    The first method to find GCF for numbers 64 and 80 is to list all factors for both numbers and pick the highest common one:

    All factors of 64: 1, 2, 4, 8, 16, 32, 64

    All factors of 80: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

    So the Greatest Common Factor for 64 and 80 is 16

    Finding GCF for 64 and 80 by Prime Factorization

    The second method to find GCF for numbers 64 and 80 is to list all Prime Factors for both numbers and multiply the common ones:

    All Prime Factors of 64: 2, 2, 2, 2, 2, 2

    All Prime Factors of 80: 2, 2, 2, 2, 5

    As we can see there are Prime Factors common to both numbers: 2, 2, 2, 2

    Now we need to multiply them to find GCF: 2 × 2 × 2 × 2 = 16

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    What is the GCF of 64 and 80. The GCF of 64 and 80 is 16 — the biggest number that can divide both integers. Step-by-step GCF (GCD) calculation by factoring.
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    GCF Table

    Number 1Number 2GCF
    64651
    64662
    64671
    64684
    64691
    64702
    64711
    64728
    64731
    64742
    64751
    64764
    64771
    64782
    64791
    648016
    64811
    64822
    64831
    64844
    64851
    64862
    64871
    64888
    64891
    64902
    64911
    64924
    64931
    64942

    About "Greatest Common Factor" Calculator

    This calculator will help you find the greatest common factor (GCF) of two numbers. For example, it can help you find out what is the Greatest Common Divisor of 64 and 80? (The answer is: 16). Select the first number (e.g. '64') and the second number (e.g. '80'). After that hit the 'Calculate' button.
    Greatest Common Factor (GCF) also known as the Greatest Common Divisor (GCD) or Highest Common Factor (HCF) - it is the largest positive integer that divides each of the integers with zero remainder.
    "Greatest Common Factor" Calculator
    Greatest Common Factor of
    and

    FAQ

    What is the Greatest Common Divisor of 64 and 80?

    GCF of 64 and 80 is 16

    How to find the GCF of 64 and 80?

    You can find the GCF of 64 and 80 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 64 and 80 is 16.

    What prime factors do 64 and 80 share?

    The prime factorizations of 64 and 80 have 2 × 2 × 2 × 2 in common, and multiplying those shared primes gives 16 — exactly the greatest common factor.

    How does the GCF reduce the fraction 64/80?

    Divide the numerator and the denominator by the GCF 16: 64 ÷ 16 = 4 and 80 ÷ 16 = 5. So 64/80 in lowest terms is 4/5.

    See Also